Luigi Mangione, the man accused of fatally shooting UnitedHealth CEO Brian Thompson outside a Manhattan hotel last year, returns to court today for the start of a key hearing that could impact the evidence allowed in the rest of his trial.

While Lakanwal began as a security guard for the unit in 2012, he later ascended to a team leader and GPS specialist, said the cousin who did not want to be publicly identified.

The officials arrived at the secret CIA archival facility one morning in April. Their mission: to seize still-classified CIA files on the assassinations of Robert F. Kennedy, John F. Kennedy and Martin Luther King Jr.